org.apache.druid.segment.column

Interface DictionaryEncodedValueIndex

All Known Subinterfaces:

DictionaryEncodedStringValueIndex

All Known Implementing Classes:

IndexedStringDictionaryEncodedStringValueIndex

public interface DictionaryEncodedValueIndex

This exposes a 'raw' view into bitmap value indexes for DictionaryEncodedColumn. This allows callers to directly retrieve bitmaps via dictionary ids. This interface should only be used when it is beneficial to operate in such a manner; callers of this class must either already know what value the dictionary id represents, not care at all, or have some other means to know exactly which bitmaps to retrieve. Most filter implementations should likely be using higher level index instead, such as StringValueSetIndex, LexicographicalRangeIndex, NumericRangeIndex, or DruidPredicateIndex.

Method Summary

Modifier and Type	Method and Description
ImmutableBitmap	getBitmap(int idx) Get the ImmutableBitmap for dictionary id of the underlying dictionary

Method Detail

getBitmap

ImmutableBitmap getBitmap(int idx)

Get the ImmutableBitmap for dictionary id of the underlying dictionary